9(b-7)=72

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Solution for 9(b-7)=72 equation: 



9(b-7)=72

We move all terms to the left:

9(b-7)-(72)=0

We multiply parentheses

9b-63-72=0

We add all the numbers together, and all the variables

9b-135=0

We move all terms containing b to the left, all other terms to the right

9b=135

b=135/9

b=15

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